The 18 best snacks to eat at your desk

What you eat all day doesn't affect just your health and weight — it affects your productivity, too.

High-fat, high-sugar meals and snacks make us sleepy and have low energy, says Lisa De Fazio, a healthy-lifestyle expert and registered dietitian. But thanks to things like boredom, lack of time, and sleep deprivation, people tend to make bad eating decisions during the workday.

Luckily, there are plenty of quick, easy, and inexpensive healthy snack options.

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Almonds

Almonds are a great source of protein and healthy fat that is satisfying. "They contain nine essential nutrients; have the highest rate of proteins when compared to other nuts; have the highest rate of fiber (3.5g per 23 pieces) when compared to other nuts; are rich in Vitamin E (23 pieces provide 35% of the daily value of Vitamin E); and contain monounsaturated fats that help increase HDL levels," explains Nicole Maftoum, a Lebanese clinical dietitian.

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Low-fat popcorn

Fresh fruit

Fruits are packed with vitamins and minerals and are full of great natural sweetness, Maftoum says. "They are also a great source of antioxidants needed for a stronger immune system and a better performance at work."

Dry cereal

The brain draws nearly all its energy from glucose, which is the most important simple sugar in human metabolism, Maftoum says. "Consumption of low glycemic index foods like bran flakes will release glucose at a slow rate in the bloodstream, which will minimize blood sugar swings and optimize brainpower and mental focus."

Tuna salad (without the mayo)

Tuna contains omega-3 fatty acids, the essential fats that are known to help to preserve brain function. Make yourself a tuna salad (a can typically costs about $2), but be sure to substitute avocado or Greek yogurt for the mayonnaise.

Apples and peanut butter

The apple provides fiber and carbohydrates for energy, while the peanut butter (you can also use almond butter) provides healthy monounsaturated fat and protein, which stabilizes blood sugar ups and downs. "This snack is so tasty and satisfying and will hold you over for a few hours," De Fazio says.